1. (a) Tani, T.Photographic Sensitivity; Oxford University Press: Oxford, 1995; Chapter 6 and references therein.
2. (b) Harbison, J. M.; Spencer, H. E. InTheTheory of the Photographic Process, 4th ed.; James, T. H., Ed.; Macmillan: New York, 1977; pp 151−152.